ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.21 by root, Sat Aug 11 19:59:19 2001 UTC vs.
Revision 1.207 by root, Tue Oct 9 22:29:27 2007 UTC

		1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
		5
1	#include "EXTERN.h"	6	#include "EXTERN.h"
2	#include "perl.h"	7	#include "perl.h"
3	#include "XSUB.h"	8	#include "XSUB.h"
4		9
5	#include "libcoro/coro.c"	10	#include "patchlevel.h"
6		11
7	#include <signal.h>	12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
8		15
9	#ifdef HAVE_MMAP	16	#ifdef HAVE_MMAP
10	# include <unistd.h>	17	# include <unistd.h>
11	# include <sys/mman.h>	18	# include <sys/mman.h>
12	# ifndef MAP_ANON
13	# ifdef MAP_ANONYMOUS	19	# ifndef MAP_ANONYMOUS
14	# define MAP_ANON MAP_ANONYMOUS	20	# ifdef MAP_ANON
		21	# define MAP_ANONYMOUS MAP_ANON
15	# else	22	# else
16	# undef HAVE_MMAP	23	# undef HAVE_MMAP
17	# endif	24	# endif
18	# endif	25	# endif
		26	# include <limits.h>
		27	# ifndef PAGESIZE
		28	# define PAGESIZE pagesize
		29	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		30	static long pagesize;
		31	# else
		32	# define BOOT_PAGESIZE (void)0
19	#endif	33	# endif
20
21	#define MAY_FLUSH /* increases codesize */
22
23	/* perl-related */
24	#define TRANSFER_SAVE_DEFAV 0x00000001
25	#define TRANSFER_SAVE_DEFSV 0x00000002
26	#define TRANSFER_SAVE_ERRSV 0x00000004
27	/* c-related */
28	#define TRANSFER_SAVE_CCTXT 0x00000008
29	#ifdef CORO_LAZY_STACK
30	# define TRANSFER_LAZY_STACK 0x00000010
31	#else	34	#else
32	# define TRANSFER_LAZY_STACK 0x00000000	35	# define PAGESIZE 0
		36	# define BOOT_PAGESIZE (void)0
		37	#endif
		38
		39	#if CORO_USE_VALGRIND
		40	# include <valgrind/valgrind.h>
		41	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		42	#else
		43	# define REGISTER_STACK(cctx,start,end)
		44	#endif
		45
		46	/* the maximum number of idle cctx that will be pooled */
		47	#define MAX_IDLE_CCTX 8
		48
		49	#define PERL_VERSION_ATLEAST(a,b,c) \
		50	(PERL_REVISION > (a) \
		51	|| (PERL_REVISION == (a) \
		52	&& (PERL_VERSION > (b) \
		53	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		54
		55	#if !PERL_VERSION_ATLEAST (5,6,0)
		56	# ifndef PL_ppaddr
		57	# define PL_ppaddr ppaddr
33	#endif	58	# endif
		59	# ifndef call_sv
		60	# define call_sv perl_call_sv
		61	# endif
		62	# ifndef get_sv
		63	# define get_sv perl_get_sv
		64	# endif
		65	# ifndef get_cv
		66	# define get_cv perl_get_cv
		67	# endif
		68	# ifndef IS_PADGV
		69	# define IS_PADGV(v) 0
		70	# endif
		71	# ifndef IS_PADCONST
		72	# define IS_PADCONST(v) 0
		73	# endif
		74	#endif
34		75
35	#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \	76	/* 5.8.7 */
36	|TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT)	77	#ifndef SvRV_set
		78	# define SvRV_set(s,v) SvRV(s) = (v)
		79	#endif
37		80
38	#define SUB_INIT "Coro::State::initialize"	81	/* 5.8.8 */
39	#define UCORO_STATE "_coro_state"	82	#ifndef GV_NOTQUAL
		83	# define GV_NOTQUAL 0
		84	#endif
		85	#ifndef newSV
		86	# define newSV(l) NEWSV(0,l)
		87	#endif
40		88
41	/* The next macro should delcare a variable stacklevel that contains and approximation	89	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
42	* to the current C stack pointer. It's property is that it changes with each call	90	# undef CORO_STACKGUARD
43	* and should be unique. */	91	#endif
		92
		93	#ifndef CORO_STACKGUARD
		94	# define CORO_STACKGUARD 0
		95	#endif
		96
		97	/* prefer perl internal functions over our own? */
		98	#ifndef CORO_PREFER_PERL_FUNCTIONS
		99	# define CORO_PREFER_PERL_FUNCTIONS 0
		100	#endif
		101
		102	/* The next macros try to return the current stack pointer, in an as
		103	* portable way as possible. */
		104	#define dSTACKLEVEL volatile char stacklevel
44	#define dSTACKLEVEL void *stacklevel = &stacklevel	105	#define STACKLEVEL ((void *)&stacklevel)
45		106
46	#define labs(l) ((l) >= 0 ? (l) : -(l))	107	#define IN_DESTRUCT (PL_main_cv == Nullcv)
47		108
48	/* this is actually not only the c stack but also c registers etc... */	109	#if __GNUC__ >= 3
		110	# define attribute(x) __attribute__(x)
		111	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		112	# define expect(expr,value) __builtin_expect ((expr),(value))
		113	#else
		114	# define attribute(x)
		115	# define BARRIER
		116	# define expect(expr,value) (expr)
		117	#endif
		118
		119	#define expect_false(expr) expect ((expr) != 0, 0)
		120	#define expect_true(expr) expect ((expr) != 0, 1)
		121
		122	#define NOINLINE attribute ((noinline))
		123
		124	#include "CoroAPI.h"
		125
		126	#ifdef USE_ITHREADS
		127	static perl_mutex coro_mutex;
		128	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		129	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		130	#else
		131	# define LOCK (void)0
		132	# define UNLOCK (void)0
		133	#endif
		134
		135	#define strpair(const) const, sizeof (const) - 1
		136
		137	/* helper storage struct for Coro::AIO */
		138	struct io_state
		139	{
		140	int errorno;
		141	I32 laststype;
		142	int laststatval;
		143	Stat_t statcache;
		144	};
		145
		146	static size_t coro_stacksize = CORO_STACKSIZE;
		147	static struct CoroAPI coroapi;
		148	static AV *main_mainstack; /* used to differentiate between $main and others */
		149	static JMPENV *main_top_env;
		150	static HV *coro_state_stash, *coro_stash;
		151	static SV *coro_mortal; /* will be freed after next transfer */
		152
		153	static GV *irsgv; /* $/ */
		154	static GV *stdoutgv; /* *STDOUT */
		155
		156	static HV *hv_sig; /* %SIG */
		157	static SV *sv_diehook;
		158	static SV *sv_warnhook;
		159
		160	/* async_pool helper stuff */
		161	static SV *sv_pool_rss;
		162	static SV *sv_pool_size;
		163	static AV *av_async_pool;
		164
		165	static struct coro_cctx *cctx_first;
		166	static int cctx_count, cctx_idle;
		167
		168	enum {
		169	CC_MAPPED = 0x01,
		170	CC_NOREUSE = 0x02, /* throw this away after tracing */
		171	CC_TRACE = 0x04,
		172	CC_TRACE_SUB = 0x08, /* trace sub calls */
		173	CC_TRACE_LINE = 0x10, /* trace each statement */
		174	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		175	};
		176
		177	/* this is a structure representing a c-level coroutine */
		178	typedef struct coro_cctx {
		179	struct coro_cctx *next;
		180
		181	/* the stack */
		182	void *sptr;
		183	size_t ssize;
		184
		185	/* cpu state */
		186	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		187	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		188	JMPENV *top_env;
		189	coro_context cctx;
		190
		191	#if CORO_USE_VALGRIND
		192	int valgrind_id;
		193	#endif
		194	unsigned char flags;
		195	} coro_cctx;
		196
		197	enum {
		198	CF_RUNNING = 0x0001, /* coroutine is running */
		199	CF_READY = 0x0002, /* coroutine is ready */
		200	CF_NEW = 0x0004, /* has never been switched to */
		201	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		202	};
		203
		204	/* the structure where most of the perl state is stored, overlaid on the cxstack */
49	typedef struct {	205	typedef struct {
50	int refcnt; /* pointer reference counter */	206	SV *defsv;
51	int usecnt; /* shared by how many coroutines */	207	AV *defav;
52	int gencnt; /* generation counter */	208	SV *errsv;
		209	SV *irsgv;
		210	#define VAR(name,type) type name;
		211	# include "state.h"
		212	#undef VAR
		213	} perl_slots;
53		214
54	coro_context cctx;	215	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
55		216
56	void *sptr;	217	/* this is a structure representing a perl-level coroutine */
57	long ssize; /* positive == mmap, otherwise malloc */
58	} coro_stack;
59
60	struct coro {	218	struct coro {
61	/* the optional C context */	219	/* the c coroutine allocated to this perl coroutine, if any */
62	coro_stack *stack;	220	coro_cctx *cctx;
63	void *cursp;
64	int gencnt;
65		221
66	/* optionally saved, might be zero */	222	/* process data */
67	AV *defav;
68	SV *defsv;
69	SV *errsv;
70
71	/* saved global state not related to stacks */
72	U8 dowarn;
73	I32 in_eval;
74
75	/* the stacks and related info (callchain etc..) */
76	PERL_SI *curstackinfo;
77	AV *curstack;
78	AV *mainstack;	223	AV *mainstack;
79	SV **stack_sp;	224	perl_slots *slot; /* basically the saved sp */
80	OP *op;
81	SV **curpad;
82	SV **stack_base;
83	SV **stack_max;
84	SV **tmps_stack;
85	I32 tmps_floor;
86	I32 tmps_ix;
87	I32 tmps_max;
88	I32 *markstack;
89	I32 *markstack_ptr;
90	I32 *markstack_max;
91	I32 *scopestack;
92	I32 scopestack_ix;
93	I32 scopestack_max;
94	ANY *savestack;
95	I32 savestack_ix;
96	I32 savestack_max;
97	OP **retstack;
98	I32 retstack_ix;
99	I32 retstack_max;
100	COP *curcop;
101	JMPENV *top_env;
102		225
103	/* data associated with this coroutine (initial args) */	226	AV *args; /* data associated with this coroutine (initial args) */
104	AV *args;	227	int refcnt; /* coroutines are refcounted, yes */
		228	int flags; /* CF_ flags */
		229	HV *hv; /* the perl hash associated with this coro, if any */
		230
		231	/* statistics */
		232	int usecount; /* number of transfers to this coro */
		233
		234	/* coro process data */
		235	int prio;
		236	SV *throw; /* exception to be thrown */
		237
		238	/* async_pool */
		239	SV *saved_deffh;
		240
		241	/* linked list */
		242	struct coro *next, *prev;
105	};	243	};
106		244
107	typedef struct coro *Coro__State;	245	typedef struct coro *Coro__State;
108	typedef struct coro *Coro__State_or_hashref;	246	typedef struct coro *Coro__State_or_hashref;
109		247
110	static AV *main_mainstack; /* used to differentiate between $main and others */	248	/** Coro ********************************************************************/
111	static HV *coro_state_stash;	249
112	static SV *ucoro_state_sv;	250	#define PRIO_MAX 3
113	static U32 ucoro_state_hash;	251	#define PRIO_HIGH 1
114	static HV *padlist_cache;	252	#define PRIO_NORMAL 0
		253	#define PRIO_LOW -1
		254	#define PRIO_IDLE -3
		255	#define PRIO_MIN -4
115		256
116	/* for Coro.pm */	257	/* for Coro.pm */
117	static GV *coro_current, *coro_idle;	258	static SV *coro_current;
		259	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
118	static AV *coro_ready;	260	static int coro_nready;
		261	static struct coro *coro_first;
119		262
120	/* mostly copied from op.c:cv_clone2 */	263	/** lowlevel stuff **********************************************************/
121	STATIC AV *	264
122	clone_padlist (AV *protopadlist)	265	static SV *
		266	coro_get_sv (const char *name, int create)
123	{	267	{
124	AV *av;	268	#if PERL_VERSION_ATLEAST (5,9,0)
125	I32 ix;	269	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
126	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);	270	get_sv (name, create);
127	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);	271	#endif
128	SV **pname = AvARRAY (protopad_name);	272	return get_sv (name, create);
129	SV **ppad = AvARRAY (protopad);	273	}
130	I32 fname = AvFILLp (protopad_name);	274
131	I32 fpad = AvFILLp (protopad);	275	static AV *
		276	coro_get_av (const char *name, int create)
		277	{
		278	#if PERL_VERSION_ATLEAST (5,9,0)
		279	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		280	get_av (name, create);
		281	#endif
		282	return get_av (name, create);
		283	}
		284
		285	static HV *
		286	coro_get_hv (const char *name, int create)
		287	{
		288	#if PERL_VERSION_ATLEAST (5,9,0)
		289	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		290	get_hv (name, create);
		291	#endif
		292	return get_hv (name, create);
		293	}
		294
		295	static AV *
		296	coro_clone_padlist (pTHX_ CV *cv)
		297	{
		298	AV *padlist = CvPADLIST (cv);
132	AV *newpadlist, *newpad_name, *newpad;	299	AV *newpadlist, *newpad;
133	SV **npad;
134
135	newpad_name = newAV ();
136	for (ix = fname; ix >= 0; ix--)
137	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
138
139	newpad = newAV ();
140	av_fill (newpad, AvFILLp (protopad));
141	npad = AvARRAY (newpad);
142		300
143	newpadlist = newAV ();	301	newpadlist = newAV ();
144	AvREAL_off (newpadlist);	302	AvREAL_off (newpadlist);
145	av_store (newpadlist, 0, (SV *) newpad_name);	303	#if PERL_VERSION_ATLEAST (5,9,0)
		304	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		305	#else
		306	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		307	#endif
		308	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		309	--AvFILLp (padlist);
		310
		311	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
146	av_store (newpadlist, 1, (SV *) newpad);	312	av_store (newpadlist, 1, (SV *)newpad);
147		313
148	av = newAV (); /* will be @_ */	314	return newpadlist;
149	av_extend (av, 0);	315	}
150	av_store (newpad, 0, (SV *) av);
151	AvFLAGS (av) = AVf_REIFY;
152		316
153	for (ix = fpad; ix > 0; ix--)	317	static void
		318	free_padlist (pTHX_ AV *padlist)
		319	{
		320	/* may be during global destruction */
		321	if (SvREFCNT (padlist))
154	{	322	{
155	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	323	I32 i = AvFILLp (padlist);
156	if (namesv && namesv != &PL_sv_undef)	324	while (i >= 0)
157	{	325	{
158	char *name = SvPVX (namesv); /* XXX */	326	SV **svp = av_fetch (padlist, i--, FALSE);
159	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	327	if (svp)
160	{ /* lexical from outside? */
161	npad[ix] = SvREFCNT_inc (ppad[ix]);
162	}	328	{
163	else
164	{ /* our own lexical */
165	SV *sv;	329	SV *sv;
166	if (*name == '&')	330	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
167	sv = SvREFCNT_inc (ppad[ix]);	331	SvREFCNT_dec (sv);
168	else if (*name == '@')	332
169	sv = (SV *) newAV ();	333	SvREFCNT_dec (*svp);
170	else if (*name == '%')
171	sv = (SV *) newHV ();
172	else
173	sv = NEWSV (0, 0);
174	if (!SvPADBUSY (sv))
175	SvPADMY_on (sv);
176	npad[ix] = sv;
177	}	334	}
178	}	335	}
179	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
180	{
181	npad[ix] = SvREFCNT_inc (ppad[ix]);
182	}
183	else
184	{
185	SV *sv = NEWSV (0, 0);
186	SvPADTMP_on (sv);
187	npad[ix] = sv;
188	}
189	}
190		336
191	#if 0 /* return -ENOTUNDERSTOOD */
192	/* Now that vars are all in place, clone nested closures. */
193
194	for (ix = fpad; ix > 0; ix--) {
195	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
196	if (namesv
197	&& namesv != &PL_sv_undef
198	&& !(SvFLAGS(namesv) & SVf_FAKE)
199	&& *SvPVX(namesv) == '&'
200	&& CvCLONE(ppad[ix]))
201	{
202	CV *kid = cv_clone((CV*)ppad[ix]);
203	SvREFCNT_dec(ppad[ix]);
204	CvCLONE_on(kid);
205	SvPADMY_on(kid);
206	npad[ix] = (SV*)kid;
207	}
208	}
209	#endif
210
211	return newpadlist;
212	}
213
214	#ifdef MAY_FLUSH
215	STATIC AV *
216	free_padlist (AV *padlist)
217	{
218	/* may be during global destruction */
219	if (SvREFCNT(padlist))
220	{
221	I32 i = AvFILLp(padlist);
222	while (i >= 0)
223	{
224	SV **svp = av_fetch(padlist, i--, FALSE);
225	SV *sv = svp ? *svp : Nullsv;
226	if (sv)
227	SvREFCNT_dec(sv);
228	}
229
230	SvREFCNT_dec((SV*)padlist);	337	SvREFCNT_dec ((SV*)padlist);
231	}	338	}
232	}	339	}
233	#endif	340
		341	static int
		342	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		343	{
		344	AV *padlist;
		345	AV *av = (AV *)mg->mg_obj;
		346
		347	/* casting is fun. */
		348	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
		349	free_padlist (aTHX_ padlist);
		350
		351	SvREFCNT_dec (av);
		352
		353	return 0;
		354	}
		355
		356	#define PERL_MAGIC_coro PERL_MAGIC_ext
		357
		358	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		359
		360	#define CORO_MAGIC(cv) \
		361	SvMAGIC (cv) \
		362	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		363	? SvMAGIC (cv) \
		364	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		365	: 0
		366
		367	static struct coro *
		368	SvSTATE_ (pTHX_ SV *coro)
		369	{
		370	HV *stash;
		371	MAGIC *mg;
		372
		373	if (SvROK (coro))
		374	coro = SvRV (coro);
		375
		376	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		377	croak ("Coro::State object required");
		378
		379	stash = SvSTASH (coro);
		380	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		381	{
		382	/* very slow, but rare, check */
		383	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		384	croak ("Coro::State object required");
		385	}
		386
		387	mg = CORO_MAGIC (coro);
		388	return (struct coro *)mg->mg_ptr;
		389	}
		390
		391	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
234		392
235	/* the next two functions merely cache the padlists */	393	/* the next two functions merely cache the padlists */
236	STATIC void	394	static void
237	get_padlist (CV *cv)	395	get_padlist (pTHX_ CV *cv)
238	{	396	{
239	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);	397	MAGIC *mg = CORO_MAGIC (cv);
		398	AV *av;
240		399
241	if (he && AvFILLp ((AV *)*he) >= 0)	400	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);	401	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	402	else
244	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
245	}
246
247	STATIC void
248	put_padlist (CV *cv)
249	{
250	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
251
252	if (SvTYPE (*he) != SVt_PVAV)
253	{	403	{
		404	#if CORO_PREFER_PERL_FUNCTIONS
		405	/* this is probably cleaner, but also slower? */
		406	CV *cp = Perl_cv_clone (cv);
		407	CvPADLIST (cv) = CvPADLIST (cp);
		408	CvPADLIST (cp) = 0;
254	SvREFCNT_dec (*he);	409	SvREFCNT_dec (cp);
255	*he = (SV *)newAV ();	410	#else
		411	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		412	#endif
256	}	413	}
257
258	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
259	}	414	}
260		415
261	#ifdef MAY_FLUSH	416	static void
262	STATIC void	417	put_padlist (pTHX_ CV *cv)
263	flush_padlist_cache ()
264	{	418	{
265	HV *hv = padlist_cache;	419	MAGIC *mg = CORO_MAGIC (cv);
266	padlist_cache = newHV ();	420	AV *av;
267		421
268	if (hv_iterinit (hv))	422	if (expect_false (!mg))
269	{
270	HE *he;
271	AV *padlist;
272
273	while (!!(he = hv_iternext (hv)))
274	{
275	AV *av = (AV *)HeVAL(he);
276
277	/* casting is fun. */
278	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
279	free_padlist (padlist);
280	}
281	}	423	{
		424	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		425	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		426	mg->mg_virtual = &vtbl_coro;
		427	mg->mg_obj = (SV *)newAV ();
		428	}
282		429
283	SvREFCNT_dec (hv);	430	av = (AV *)mg->mg_obj;
284	}
285	#endif
286		431
287	#define SB do {	432	if (expect_false (AvFILLp (av) >= AvMAX (av)))
288	#define SE } while (0)	433	av_extend (av, AvMAX (av) + 1);
289		434
290	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE	435	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
291	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE	436	}
292		437
293	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	438	/** load & save, init *******************************************************/
294		439
295	static void	440	static void
296	load_state(pTHX_ Coro__State c)	441	load_perl (pTHX_ Coro__State c)
297	{	442	{
298	PL_dowarn = c->dowarn;	443	perl_slots *slot = c->slot;
299	PL_in_eval = c->in_eval;	444	c->slot = 0;
300		445
301	PL_curstackinfo = c->curstackinfo;
302	PL_curstack = c->curstack;
303	PL_mainstack = c->mainstack;	446	PL_mainstack = c->mainstack;
304	PL_stack_sp = c->stack_sp;
305	PL_op = c->op;
306	PL_curpad = c->curpad;
307	PL_stack_base = c->stack_base;
308	PL_stack_max = c->stack_max;
309	PL_tmps_stack = c->tmps_stack;
310	PL_tmps_floor = c->tmps_floor;
311	PL_tmps_ix = c->tmps_ix;
312	PL_tmps_max = c->tmps_max;
313	PL_markstack = c->markstack;
314	PL_markstack_ptr = c->markstack_ptr;
315	PL_markstack_max = c->markstack_max;
316	PL_scopestack = c->scopestack;
317	PL_scopestack_ix = c->scopestack_ix;
318	PL_scopestack_max = c->scopestack_max;
319	PL_savestack = c->savestack;
320	PL_savestack_ix = c->savestack_ix;
321	PL_savestack_max = c->savestack_max;
322	PL_retstack = c->retstack;
323	PL_retstack_ix = c->retstack_ix;
324	PL_retstack_max = c->retstack_max;
325	PL_curcop = c->curcop;
326	PL_top_env = c->top_env;
327		447
328	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	448	GvSV (PL_defgv) = slot->defsv;
329	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	449	GvAV (PL_defgv) = slot->defav;
330	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	450	GvSV (PL_errgv) = slot->errsv;
		451	GvSV (irsgv) = slot->irsgv;
		452
		453	#define VAR(name,type) PL_ ## name = slot->name;
		454	# include "state.h"
		455	#undef VAR
		456
		457	/*hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);*/
		458	/*hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);*/
331		459
332	{	460	{
333	dSP;	461	dSP;
		462
334	CV *cv;	463	CV *cv;
335		464
336	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
337	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
338	{	467	{
339	AV *padlist = (AV *)POPs;
340
341	if (padlist)
342	{
343	put_padlist (cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
344	CvPADLIST(cv) = padlist;	469	CvDEPTH (cv) = PTR2IV (POPs);
345	#ifdef USE_THREADS	470	CvPADLIST (cv) = (AV *)POPs;
346	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
347	#endif
348	}
349
350	++CvDEPTH(cv);
351	}	471	}
352		472
353	PUTBACK;	473	PUTBACK;
354	}	474	}
355	}	475	}
356		476
357	static void	477	static void
358	save_state(pTHX_ Coro__State c, int flags)	478	save_perl (pTHX_ Coro__State c)
359	{	479	{
360	{	480	{
361	dSP;	481	dSP;
362	I32 cxix = cxstack_ix;	482	I32 cxix = cxstack_ix;
363	PERL_CONTEXT *ccstk = cxstack;	483	PERL_CONTEXT *ccstk = cxstack;
…		…
366	/*	486	/*
367	* the worst thing you can imagine happens first - we have to save	487	* the worst thing you can imagine happens first - we have to save
368	* (and reinitialize) all cv's in the whole callchain :(	488	* (and reinitialize) all cv's in the whole callchain :(
369	*/	489	*/
370		490
371	PUSHs (Nullsv);	491	XPUSHs (Nullsv);
372	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
373	for (;;)	493	for (;;)
374	{	494	{
375	do	495	while (expect_true (cxix >= 0))
376	{	496	{
377	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
378		498
379	if (CxTYPE(cx) == CXt_SUB)	499	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
380	{	500	{
381	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
		502
382	if (CvDEPTH(cv))	503	if (expect_true (CvDEPTH (cv)))
383	{	504	{
384	#ifdef USE_THREADS
385	/*XPUSHs ((SV *)CvOWNER(cv));*/
386	/*CvOWNER(cv) = 0;*/
387	/*error must unlock this cv etc.. etc...*/
388	#endif
389	EXTEND (SP, CvDEPTH(cv)*2);	505	EXTEND (SP, 3);
390
391	while (--CvDEPTH(cv))
392	{
393	/* this tells the restore code to increment CvDEPTH */
394	PUSHs (Nullsv);
395	PUSHs ((SV *)cv);
396	}
397
398	PUSHs ((SV *)CvPADLIST(cv));	506	PUSHs ((SV *)CvPADLIST (cv));
		507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
399	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
400		509
401	get_padlist (cv); /* this is a monster */	510	CvDEPTH (cv) = 0;
		511	get_padlist (aTHX_ cv);
402	}	512	}
403	}	513	}
404	else if (CxTYPE(cx) == CXt_FORMAT)
405	{
406	/* I never used formats, so how should I know how these are implemented? */
407	/* my bold guess is as a simple, plain sub... */
408	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
409	}
410	}	514	}
411	while (cxix >= 0);
412		515
413	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
414	break;	517	break;
415		518
416	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
417	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
418	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
419	}	522	}
420		523
421	PUTBACK;	524	PUTBACK;
422	}	525	}
423		526
424	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
425	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
426	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	529	if (SLOT_COUNT >= 1) CXINC;
		530	if (SLOT_COUNT >= 2) CXINC;
		531	if (SLOT_COUNT >= 3) CXINC;
		532	{
		533	int i;
		534	for (i = 3; i < SLOT_COUNT; ++i)
		535	CXINC;
		536	}
		537	cxstack_ix -= SLOT_COUNT; /* undo allocation */
427		538
428	/* I have not the slightest idea of why av_reify is necessary */
429	/* but if it's missing the defav contents magically get replaced sometimes */
430	if (c->defav)
431	av_reify (c->defav);
432
433	c->dowarn = PL_dowarn;
434	c->in_eval = PL_in_eval;
435
436	c->curstackinfo = PL_curstackinfo;
437	c->curstack = PL_curstack;
438	c->mainstack = PL_mainstack;	539	c->mainstack = PL_mainstack;
439	c->stack_sp = PL_stack_sp;	540
440	c->op = PL_op;	541	{
441	c->curpad = PL_curpad;	542	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
442	c->stack_base = PL_stack_base;	543
443	c->stack_max = PL_stack_max;	544	slot->defav = GvAV (PL_defgv);
444	c->tmps_stack = PL_tmps_stack;	545	slot->defsv = DEFSV;
445	c->tmps_floor = PL_tmps_floor;	546	slot->errsv = ERRSV;
446	c->tmps_ix = PL_tmps_ix;	547	slot->irsgv = GvSV (irsgv);
447	c->tmps_max = PL_tmps_max;	548
448	c->markstack = PL_markstack;	549	#define VAR(name,type) slot->name = PL_ ## name;
449	c->markstack_ptr = PL_markstack_ptr;	550	# include "state.h"
450	c->markstack_max = PL_markstack_max;	551	#undef VAR
451	c->scopestack = PL_scopestack;	552	}
452	c->scopestack_ix = PL_scopestack_ix;
453	c->scopestack_max = PL_scopestack_max;
454	c->savestack = PL_savestack;
455	c->savestack_ix = PL_savestack_ix;
456	c->savestack_max = PL_savestack_max;
457	c->retstack = PL_retstack;
458	c->retstack_ix = PL_retstack_ix;
459	c->retstack_max = PL_retstack_max;
460	c->curcop = PL_curcop;
461	c->top_env = PL_top_env;
462	}	553	}
463		554
464	/*	555	/*
465	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
466	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
467	* on the assumption that coroutines do not usually need	558	* on the (sometimes correct) assumption that coroutines do
468	* a lot of stackspace.	559	* not usually need a lot of stackspace.
469	*/	560	*/
470	STATIC void	561	#if CORO_PREFER_PERL_FUNCTIONS
		562	# define coro_init_stacks init_stacks
		563	#else
		564	static void
471	coro_init_stacks (pTHX)	565	coro_init_stacks (pTHX)
472	{	566	{
473	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	567	PL_curstackinfo = new_stackinfo(32, 8);
474	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
475	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
476	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
477		571
478	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
479	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
480	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
481		575
482	New(50,PL_tmps_stack,96,SV*);	576	New(50,PL_tmps_stack,32,SV*);
483	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
484	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
485	PL_tmps_max = 96;	579	PL_tmps_max = 32;
486		580
487	New(54,PL_markstack,16,I32);	581	New(54,PL_markstack,16,I32);
488	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
489	PL_markstack_max = PL_markstack + 16;	583	PL_markstack_max = PL_markstack + 16;
490		584
		585	#ifdef SET_MARK_OFFSET
491	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
		587	#endif
492		588
493	New(54,PL_scopestack,16,I32);	589	New(54,PL_scopestack,8,I32);
494	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
495	PL_scopestack_max = 16;	591	PL_scopestack_max = 8;
496		592
497	New(54,PL_savestack,96,ANY);	593	New(54,PL_savestack,24,ANY);
498	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
499	PL_savestack_max = 96;	595	PL_savestack_max = 24;
500		596
		597	#if !PERL_VERSION_ATLEAST (5,9,0)
501	New(54,PL_retstack,8,OP*);	598	New(54,PL_retstack,4,OP*);
502	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
503	PL_retstack_max = 8;	600	PL_retstack_max = 4;
		601	#endif
504	}	602	}
		603	#endif
505		604
506	/*	605	/*
507	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
508	* still there is a memleak of 128 bytes...
509	*/	607	*/
510	STATIC void	608	static void
511	destroy_stacks(pTHX)	609	coro_destroy_stacks (pTHX)
512	{	610	{
513	/* is this ugly, I ask? */
514	while (PL_scopestack_ix)
515	LEAVE;
516
517	/* sure it is, but more important: is it correct?? :/ */
518	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
519	FREETMPS;
520
521	while (PL_curstackinfo->si_next)	611	while (PL_curstackinfo->si_next)
522	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
523		613
524	while (PL_curstackinfo)	614	while (PL_curstackinfo)
525	{	615	{
526	PERL_SI *p = PL_curstackinfo->si_prev;	616	PERL_SI *p = PL_curstackinfo->si_prev;
527		617
528	{	618	if (!IN_DESTRUCT)
529	dSP;
530	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
531	PUTBACK; /* possibly superfluous */
532	}
533
534	dounwind(-1);
535
536	SvREFCNT_dec(PL_curstackinfo->si_stack);	619	SvREFCNT_dec (PL_curstackinfo->si_stack);
		620
537	Safefree(PL_curstackinfo->si_cxstack);	621	Safefree (PL_curstackinfo->si_cxstack);
538	Safefree(PL_curstackinfo);	622	Safefree (PL_curstackinfo);
539	PL_curstackinfo = p;	623	PL_curstackinfo = p;
540	}	624	}
541		625
542	Safefree(PL_tmps_stack);	626	Safefree (PL_tmps_stack);
543	Safefree(PL_markstack);	627	Safefree (PL_markstack);
544	Safefree(PL_scopestack);	628	Safefree (PL_scopestack);
545	Safefree(PL_savestack);	629	Safefree (PL_savestack);
		630	#if !PERL_VERSION_ATLEAST (5,9,0)
546	Safefree(PL_retstack);	631	Safefree (PL_retstack);
547	}
548
549	static void
550	allocate_stack (Coro__State ctx, int alloc)
551	{
552	coro_stack *stack;
553
554	New (0, stack, 1, coro_stack);
555
556	stack->refcnt = 1;
557	stack->usecnt = 1;
558	stack->gencnt = ctx->gencnt = 0;
559	if (alloc)
560	{
561	#ifdef HAVE_MMAP
562	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
563	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
564	if (stack->sptr == (void *)-1)
565	#endif	632	#endif
		633	}
		634
		635	static size_t
		636	coro_rss (pTHX_ struct coro *coro)
		637	{
		638	size_t rss = sizeof (*coro);
		639
		640	if (coro->mainstack)
		641	{
		642	perl_slots tmp_slot;
		643	perl_slots *slot;
		644
		645	if (coro->flags & CF_RUNNING)
566	{	646	{
567	/*FIXME*//*D*//* reasonable stack size! */	647	slot = &tmp_slot;
568	stack->ssize = -4096 * sizeof (long);	648
569	New (0, stack->sptr, 4096, long);	649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
570	}	652	}
571	}
572	else
573	stack->sptr = 0;
574
575	ctx->stack = stack;
576	}
577
578	static void
579	deallocate_stack (Coro__State ctx)
580	{
581	coro_stack *stack = ctx->stack;
582
583	ctx->stack = 0;
584
585	if (stack)
586	{
587	if (!--stack->refcnt)
588	{
589	#ifdef HAVE_MMAP
590	if (stack->ssize > 0 && stack->sptr)
591	munmap (stack->sptr, stack->ssize);
592	else	653	else
593	#else	654	slot = coro->slot;
594	Safefree (stack->sptr);
595	#endif
596	Safefree (stack);
597	}
598	else if (ctx->gencnt == stack->gencnt)
599	--stack->usecnt;
600	}
601	}
602		655
		656	rss += sizeof (slot->curstackinfo);
		657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		659	rss += slot->tmps_max * sizeof (SV *);
		660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		661	rss += slot->scopestack_max * sizeof (I32);
		662	rss += slot->savestack_max * sizeof (ANY);
		663
		664	#if !PERL_VERSION_ATLEAST (5,9,0)
		665	rss += slot->retstack_max * sizeof (OP *);
		666	#endif
		667	}
		668
		669	return rss;
		670	}
		671
		672	/** coroutine stack handling ************************************************/
		673
603	static void	674	static void
604	setup_coro (void *arg)	675	coro_setup (pTHX_ struct coro *coro)
605	{	676	{
606	/*	677	/*
607	* emulate part of the perl startup here.	678	* emulate part of the perl startup here.
608	*/	679	*/
		680	coro_init_stacks (aTHX);
		681
		682	PL_runops = RUNOPS_DEFAULT;
		683	PL_curcop = &PL_compiling;
		684	PL_in_eval = EVAL_NULL;
		685	PL_comppad = 0;
		686	PL_curpm = 0;
		687	PL_curpad = 0;
		688	PL_localizing = 0;
		689	PL_dirty = 0;
		690	PL_restartop = 0;
		691	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		692	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		693
		694	GvSV (PL_defgv) = newSV (0);
		695	GvAV (PL_defgv) = coro->args; coro->args = 0;
		696	GvSV (PL_errgv) = newSV (0);
		697	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		698	PL_rs = newSVsv (GvSV (irsgv));
		699	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		700
		701	{
		702	dSP;
		703	LOGOP myop;
		704
		705	Zero (&myop, 1, LOGOP);
		706	myop.op_next = Nullop;
		707	myop.op_flags = OPf_WANT_VOID;
		708
		709	PUSHMARK (SP);
		710	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		711	PUTBACK;
		712	PL_op = (OP *)&myop;
		713	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		714	SPAGAIN;
		715	}
		716
		717	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		718	}
		719
		720	static void
		721	coro_destroy (pTHX_ struct coro *coro)
		722	{
		723	if (!IN_DESTRUCT)
		724	{
		725	/* restore all saved variables and stuff */
		726	LEAVE_SCOPE (0);
		727	assert (PL_tmps_floor == -1);
		728
		729	/* free all temporaries */
		730	FREETMPS;
		731	assert (PL_tmps_ix == -1);
		732
		733	/* unwind all extra stacks */
		734	POPSTACK_TO (PL_mainstack);
		735
		736	/* unwind main stack */
		737	dounwind (-1);
		738	}
		739
		740	SvREFCNT_dec (GvSV (PL_defgv));
		741	SvREFCNT_dec (GvAV (PL_defgv));
		742	SvREFCNT_dec (GvSV (PL_errgv));
		743	SvREFCNT_dec (PL_defoutgv);
		744	SvREFCNT_dec (PL_rs);
		745	SvREFCNT_dec (GvSV (irsgv));
		746
		747	SvREFCNT_dec (PL_diehook);
		748	SvREFCNT_dec (PL_warnhook);
		749
		750	SvREFCNT_dec (coro->saved_deffh);
		751	SvREFCNT_dec (coro->throw);
		752
		753	coro_destroy_stacks (aTHX);
		754	}
		755
		756	static void
		757	free_coro_mortal (pTHX)
		758	{
		759	if (expect_true (coro_mortal))
		760	{
		761	SvREFCNT_dec (coro_mortal);
		762	coro_mortal = 0;
		763	}
		764	}
		765
		766	static int
		767	runops_trace (pTHX)
		768	{
		769	COP *oldcop = 0;
		770	int oldcxix = -2;
		771	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		772	coro_cctx *cctx = coro->cctx;
		773
		774	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		775	{
		776	PERL_ASYNC_CHECK ();
		777
		778	if (cctx->flags & CC_TRACE_ALL)
		779	{
		780	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		781	{
		782	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		783	SV **bot, **top;
		784	AV *av = newAV (); /* return values */
		785	SV **cb;
		786	dSP;
		787
		788	GV *gv = CvGV (cx->blk_sub.cv);
		789	SV *fullname = sv_2mortal (newSV (0));
		790	if (isGV (gv))
		791	gv_efullname3 (fullname, gv, 0);
		792
		793	bot = PL_stack_base + cx->blk_oldsp + 1;
		794	top = cx->blk_gimme == G_ARRAY ? SP + 1
		795	: cx->blk_gimme == G_SCALAR ? bot + 1
		796	: bot;
		797
		798	av_extend (av, top - bot);
		799	while (bot < top)
		800	av_push (av, SvREFCNT_inc (*bot++));
		801
		802	PL_runops = RUNOPS_DEFAULT;
		803	ENTER;
		804	SAVETMPS;
		805	EXTEND (SP, 3);
		806	PUSHMARK (SP);
		807	PUSHs (&PL_sv_no);
		808	PUSHs (fullname);
		809	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		810	PUTBACK;
		811	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		812	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		813	SPAGAIN;
		814	FREETMPS;
		815	LEAVE;
		816	PL_runops = runops_trace;
		817	}
		818
		819	if (oldcop != PL_curcop)
		820	{
		821	oldcop = PL_curcop;
		822
		823	if (PL_curcop != &PL_compiling)
		824	{
		825	SV **cb;
		826
		827	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		828	{
		829	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		830
		831	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		832	{
		833	runops_proc_t old_runops = PL_runops;
		834	dSP;
		835	GV *gv = CvGV (cx->blk_sub.cv);
		836	SV *fullname = sv_2mortal (newSV (0));
		837
		838	if (isGV (gv))
		839	gv_efullname3 (fullname, gv, 0);
		840
		841	PL_runops = RUNOPS_DEFAULT;
		842	ENTER;
		843	SAVETMPS;
		844	EXTEND (SP, 3);
		845	PUSHMARK (SP);
		846	PUSHs (&PL_sv_yes);
		847	PUSHs (fullname);
		848	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		849	PUTBACK;
		850	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		851	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		852	SPAGAIN;
		853	FREETMPS;
		854	LEAVE;
		855	PL_runops = runops_trace;
		856	}
		857
		858	oldcxix = cxstack_ix;
		859	}
		860
		861	if (cctx->flags & CC_TRACE_LINE)
		862	{
		863	dSP;
		864
		865	PL_runops = RUNOPS_DEFAULT;
		866	ENTER;
		867	SAVETMPS;
		868	EXTEND (SP, 3);
		869	PL_runops = RUNOPS_DEFAULT;
		870	PUSHMARK (SP);
		871	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		872	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		873	PUTBACK;
		874	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		875	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		876	SPAGAIN;
		877	FREETMPS;
		878	LEAVE;
		879	PL_runops = runops_trace;
		880	}
		881	}
		882	}
		883	}
		884	}
		885
		886	TAINT_NOT;
		887	return 0;
		888	}
		889
		890	/* inject a fake call to Coro::State::_cctx_init into the execution */
		891	/* _cctx_init should be careful, as it could be called at almost any time */
		892	/* during execution of a perl program */
		893	static void NOINLINE
		894	cctx_prepare (pTHX_ coro_cctx *cctx)
		895	{
609	dSP;	896	dSP;
610	Coro__State ctx = (Coro__State)arg;	897	LOGOP myop;
611	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
612		898
613	coro_init_stacks (aTHX);	899	PL_top_env = &PL_start_env;
614	/*PL_curcop = 0;*/
615	/*PL_in_eval = PL_in_eval;*/ /* inherit */
616	SvREFCNT_dec (GvAV (PL_defgv));
617	GvAV (PL_defgv) = ctx->args;
618		900
		901	if (cctx->flags & CC_TRACE)
		902	PL_runops = runops_trace;
		903
		904	Zero (&myop, 1, LOGOP);
		905	myop.op_next = PL_op;
		906	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		907
		908	PUSHMARK (SP);
		909	EXTEND (SP, 2);
		910	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		911	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		912	PUTBACK;
		913	PL_op = (OP *)&myop;
		914	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
619	SPAGAIN;	915	SPAGAIN;
		916	}
620		917
621	if (ctx->stack)	918	/*
622	{	919	* this is a _very_ stripped down perl interpreter ;)
623	ctx->cursp = 0;	920	*/
		921	static void
		922	cctx_run (void *arg)
		923	{
		924	dTHX;
624		925
625	PUSHMARK(SP);	926	/* cctx_run is the alternative tail of transfer(), so unlock here. */
626	PUTBACK;	927	UNLOCK;
627	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
628		928
629	if (SvTRUE (ERRSV))	929	/* we now skip the entersub that lead to transfer() */
630	croak (NULL);	930	PL_op = PL_op->op_next;
631	else	931
632	croak ("FATAL: CCTXT coroutine returned!");	932	/* inject a fake subroutine call to cctx_init */
		933	cctx_prepare (aTHX_ (coro_cctx *)arg);
		934
		935	/* somebody or something will hit me for both perl_run and PL_restartop */
		936	PL_restartop = PL_op;
		937	perl_run (PL_curinterp);
		938
		939	/*
		940	* If perl-run returns we assume exit() was being called or the coro
		941	* fell off the end, which seems to be the only valid (non-bug)
		942	* reason for perl_run to return. We try to exit by jumping to the
		943	* bootstrap-time "top" top_env, as we cannot restore the "main"
		944	* coroutine as Coro has no such concept
		945	*/
		946	PL_top_env = main_top_env;
		947	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		948	}
		949
		950	static coro_cctx *
		951	cctx_new ()
		952	{
		953	coro_cctx *cctx;
		954	void *stack_start;
		955	size_t stack_size;
		956
		957	++cctx_count;
		958
		959	Newz (0, cctx, 1, coro_cctx);
		960
		961	#if HAVE_MMAP
		962	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		963	/* mmap supposedly does allocate-on-write for us */
		964	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		965
		966	if (cctx->sptr != (void *)-1)
		967	{
		968	# if CORO_STACKGUARD
		969	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		970	# endif
		971	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		972	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		973	cctx->flags |= CC_MAPPED;
633	}	974	}
634	else	975	else
635	{	976	#endif
636	UNOP myop;
637
638	PL_op = (OP *)&myop;
639
640	Zero(&myop, 1, UNOP);
641	myop.op_next = Nullop;
642	myop.op_flags = OPf_WANT_VOID;
643
644	PUSHMARK(SP);
645	XPUSHs (sub_init);
646	/*
647	* the next line is slightly wrong, as PL_op->op_next
648	* is actually being executed so we skip the first op.
649	* that doesn't matter, though, since it is only
650	* pp_nextstate and we never return...
651	* ah yes, and I don't care anyways ;)
652	*/
653	PUTBACK;
654	PL_op = pp_entersub();
655	SPAGAIN;
656
657	ENTER; /* necessary e.g. for dounwind */
658	}	977	{
659	}	978	cctx->ssize = coro_stacksize * (long)sizeof (long);
		979	New (0, cctx->sptr, coro_stacksize, long);
660		980
661	static void	981	if (!cctx->sptr)
662	continue_coro (void *arg)	982	{
663	{	983	perror ("FATAL: unable to allocate stack for coroutine");
664	/*	984	_exit (EXIT_FAILURE);
665	* this is a _very_ stripped down perl interpreter ;)	985	}
666	*/
667	Coro__State ctx = (Coro__State)arg;
668		986
669	/*FIXME*//* must set up top_env here */	987	stack_start = cctx->sptr;
670	ctx->cursp = 0;	988	stack_size = cctx->ssize;
671	PL_op = PL_op->op_next;	989	}
672	CALLRUNOPS(aTHX);
673		990
674	abort ();	991	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
675	}	992	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
676		993
677	STATIC void	994	return cctx;
		995	}
		996
		997	static void
		998	cctx_destroy (coro_cctx *cctx)
		999	{
		1000	if (!cctx)
		1001	return;
		1002
		1003	--cctx_count;
		1004
		1005	#if CORO_USE_VALGRIND
		1006	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1007	#endif
		1008
		1009	#if HAVE_MMAP
		1010	if (cctx->flags & CC_MAPPED)
		1011	munmap (cctx->sptr, cctx->ssize);
		1012	else
		1013	#endif
		1014	Safefree (cctx->sptr);
		1015
		1016	Safefree (cctx);
		1017	}
		1018
		1019	/* wether this cctx should be destructed */
		1020	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1021
		1022	static coro_cctx *
		1023	cctx_get (pTHX)
		1024	{
		1025	while (expect_true (cctx_first))
		1026	{
		1027	coro_cctx *cctx = cctx_first;
		1028	cctx_first = cctx->next;
		1029	--cctx_idle;
		1030
		1031	if (expect_true (!CCTX_EXPIRED (cctx)))
		1032	return cctx;
		1033
		1034	cctx_destroy (cctx);
		1035	}
		1036
		1037	return cctx_new ();
		1038	}
		1039
		1040	static void
		1041	cctx_put (coro_cctx *cctx)
		1042	{
		1043	/* free another cctx if overlimit */
		1044	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1045	{
		1046	coro_cctx *first = cctx_first;
		1047	cctx_first = first->next;
		1048	--cctx_idle;
		1049
		1050	cctx_destroy (first);
		1051	}
		1052
		1053	++cctx_idle;
		1054	cctx->next = cctx_first;
		1055	cctx_first = cctx;
		1056	}
		1057
		1058	/** coroutine switching *****************************************************/
		1059
		1060	static void
		1061	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1062	{
		1063	if (expect_true (prev != next))
		1064	{
		1065	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1066	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1067
		1068	if (expect_false (next->flags & CF_RUNNING))
		1069	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1070
		1071	if (expect_false (next->flags & CF_DESTROYED))
		1072	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1073
		1074	if (
		1075	#if PERL_VERSION_ATLEAST (5,9,0)
		1076	expect_false (PL_parser)
		1077	#else
		1078	expect_false (PL_lex_state != LEX_NOTPARSING)
		1079	#endif
		1080	)
		1081	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1082	}
		1083	}
		1084
		1085	/* always use the TRANSFER macro */
		1086	static void NOINLINE
678	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	1087	transfer (pTHX_ struct coro *prev, struct coro *next)
679	{	1088	{
680	dSP;
681	dSTACKLEVEL;	1089	dSTACKLEVEL;
682		1090
683	if (prev != next)	1091	/* sometimes transfer is only called to set idle_sp */
		1092	if (expect_false (!next))
		1093	{
		1094	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1095	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
684	{	1096	}
685	if (next->mainstack)	1097	else if (expect_true (prev != next))
		1098	{
		1099	coro_cctx *prev__cctx;
		1100
		1101	if (expect_false (prev->flags & CF_NEW))
686	{	1102	{
687	SAVE (prev, flags);	1103	/* create a new empty context */
688	LOAD (next);	1104	Newz (0, prev->cctx, 1, coro_cctx);
689		1105	prev->flags &= ~CF_NEW;
690	/* mark this state as in-use */	1106	prev->flags |= CF_RUNNING;
691	next->mainstack = 0;
692	next->tmps_ix = -2;
693
694	/* stacklevel changed? if yes, grab the stack for us! */
695	if (flags & TRANSFER_SAVE_CCTXT)
696	{
697	if (!prev->stack)
698	allocate_stack (prev, 0);
699	else if (prev->cursp != stacklevel
700	&& prev->stack->usecnt > 1)
701	{
702	prev->gencnt = ++prev->stack->gencnt;
703	prev->stack->usecnt = 1;
704	}
705
706	/* has our stack been invalidated? */
707	if (next->stack && next->stack->gencnt != next->gencnt)
708	{
709	deallocate_stack (next);
710	allocate_stack (next, 1);
711	coro_create (&(next->stack->cctx),
712	continue_coro, (void *)next,
713	next->stack->sptr, labs (next->stack->ssize));
714	}
715
716	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
717	}
718
719	}	1107	}
720	else if (next->tmps_ix == -2)	1108
721	croak ("tried to transfer to running coroutine");	1109	prev->flags &= ~CF_RUNNING;
		1110	next->flags |= CF_RUNNING;
		1111
		1112	LOCK;
		1113
		1114	if (expect_false (next->flags & CF_NEW))
		1115	{
		1116	/* need to start coroutine */
		1117	next->flags &= ~CF_NEW;
		1118	/* first get rid of the old state */
		1119	save_perl (aTHX_ prev);
		1120	/* setup coroutine call */
		1121	coro_setup (aTHX_ next);
		1122	}
722	else	1123	else
723	{	1124	{
724	SAVE (prev, -1); /* first get rid of the old state */	1125	/* coroutine already started */
		1126	save_perl (aTHX_ prev);
		1127	load_perl (aTHX_ next);
		1128	}
725		1129
726	if (flags & TRANSFER_SAVE_CCTXT)	1130	prev__cctx = prev->cctx;
		1131
		1132	/* possibly "free" the cctx */
		1133	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1134	{
		1135	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1136	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1137
		1138	prev->cctx = 0;
		1139
		1140	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1141	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1142	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1143	if (!next->cctx)
		1144	next->cctx = cctx_get (aTHX);
		1145
		1146	cctx_put (prev__cctx);
		1147	}
		1148
		1149	++next->usecount;
		1150
		1151	if (expect_true (!next->cctx))
		1152	next->cctx = cctx_get (aTHX);
		1153
		1154	if (expect_false (prev__cctx != next->cctx))
		1155	{
		1156	prev__cctx->top_env = PL_top_env;
		1157	PL_top_env = next->cctx->top_env;
		1158	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1159	}
		1160
		1161	free_coro_mortal (aTHX);
		1162	UNLOCK;
		1163
		1164	if (expect_false (prev->throw || next->throw))
		1165	{
		1166	struct coro *coro = SvSTATE (coro_current);
		1167
		1168	if (coro->throw)
727	{	1169	{
728	if (!prev->stack)	1170	SV *exception = coro->throw;
729	allocate_stack (prev, 0);	1171	coro->throw = 0;
730		1172	sv_setsv (ERRSV, exception);
731	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)	1173	croak (0);
732	{
733	setup_coro (next);
734
735	prev->stack->refcnt++;
736	prev->stack->usecnt++;
737	next->stack = prev->stack;
738	next->gencnt = prev->gencnt;
739	}
740	else
741	{
742	allocate_stack (next, 1);
743	coro_create (&(next->stack->cctx),
744	setup_coro, (void *)next,
745	next->stack->sptr, labs (next->stack->ssize));
746	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
747	}
748	}	1174	}
749	else
750	setup_coro (next);
751	}	1175	}
752	}	1176	}
753
754	next->cursp = stacklevel;
755	}	1177	}
756		1178
757	static struct coro *	1179	struct transfer_args
758	sv_to_coro (SV *arg, const char *funcname, const char *varname)
759	{	1180	{
760	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	1181	struct coro *prev, *next;
		1182	};
		1183
		1184	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1185	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1186
		1187	/** high level stuff ********************************************************/
		1188
		1189	static int
		1190	coro_state_destroy (pTHX_ struct coro *coro)
		1191	{
		1192	if (coro->flags & CF_DESTROYED)
		1193	return 0;
		1194
		1195	coro->flags |= CF_DESTROYED;
		1196
		1197	if (coro->flags & CF_READY)
761	{	1198	{
762	HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);	1199	/* reduce nready, as destroying a ready coro effectively unreadies it */
763		1200	/* alternative: look through all ready queues and remove the coro */
764	if (!he)	1201	LOCK;
765	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);	1202	--coro_nready;
766		1203	UNLOCK;
767	arg = HeVAL(he);
768	}	1204	}
769
770	/* must also be changed inside Coro::Cont::yield */
771	if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
772	return (struct coro *) SvIV((SV*)SvRV(arg));
773	else	1205	else
774	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	1206	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
775	}
776		1207
		1208	if (coro->mainstack && coro->mainstack != main_mainstack)
		1209	{
		1210	struct coro temp;
		1211
		1212	if (coro->flags & CF_RUNNING)
		1213	croak ("FATAL: tried to destroy currently running coroutine");
		1214
		1215	save_perl (aTHX_ &temp);
		1216	load_perl (aTHX_ coro);
		1217
		1218	coro_destroy (aTHX_ coro);
		1219
		1220	load_perl (aTHX_ &temp);
		1221
		1222	coro->slot = 0;
		1223	}
		1224
		1225	cctx_destroy (coro->cctx);
		1226	SvREFCNT_dec (coro->args);
		1227
		1228	if (coro->next) coro->next->prev = coro->prev;
		1229	if (coro->prev) coro->prev->next = coro->next;
		1230	if (coro == coro_first) coro_first = coro->next;
		1231
		1232	return 1;
		1233	}
		1234
		1235	static int
		1236	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1237	{
		1238	struct coro *coro = (struct coro *)mg->mg_ptr;
		1239	mg->mg_ptr = 0;
		1240
		1241	coro->hv = 0;
		1242
		1243	if (--coro->refcnt < 0)
		1244	{
		1245	coro_state_destroy (aTHX_ coro);
		1246	Safefree (coro);
		1247	}
		1248
		1249	return 0;
		1250	}
		1251
		1252	static int
		1253	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1254	{
		1255	struct coro *coro = (struct coro *)mg->mg_ptr;
		1256
		1257	++coro->refcnt;
		1258
		1259	return 0;
		1260	}
		1261
		1262	static MGVTBL coro_state_vtbl = {
		1263	0, 0, 0, 0,
		1264	coro_state_free,
		1265	0,
		1266	#ifdef MGf_DUP
		1267	coro_state_dup,
		1268	#else
		1269	# define MGf_DUP 0
		1270	#endif
		1271	};
		1272
		1273	static void
		1274	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1275	{
		1276	ta->prev = SvSTATE (prev_sv);
		1277	ta->next = SvSTATE (next_sv);
		1278	TRANSFER_CHECK (*ta);
		1279	}
		1280
		1281	static void
		1282	api_transfer (SV *prev_sv, SV *next_sv)
		1283	{
		1284	dTHX;
		1285	struct transfer_args ta;
		1286
		1287	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1288	TRANSFER (ta);
		1289	}
		1290
		1291	/** Coro ********************************************************************/
		1292
		1293	static void
		1294	coro_enq (pTHX_ SV *coro_sv)
		1295	{
		1296	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1297	}
		1298
		1299	static SV *
		1300	coro_deq (pTHX_ int min_prio)
		1301	{
		1302	int prio = PRIO_MAX - PRIO_MIN;
		1303
		1304	min_prio -= PRIO_MIN;
		1305	if (min_prio < 0)
		1306	min_prio = 0;
		1307
		1308	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		1309	if (AvFILLp (coro_ready [prio]) >= 0)
		1310	return av_shift (coro_ready [prio]);
		1311
		1312	return 0;
		1313	}
		1314
		1315	static int
		1316	api_ready (SV *coro_sv)
		1317	{
		1318	dTHX;
		1319	struct coro *coro;
		1320
		1321	if (SvROK (coro_sv))
		1322	coro_sv = SvRV (coro_sv);
		1323
		1324	coro = SvSTATE (coro_sv);
		1325
		1326	if (coro->flags & CF_READY)
		1327	return 0;
		1328
		1329	coro->flags |= CF_READY;
		1330
		1331	LOCK;
		1332	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1333	++coro_nready;
		1334	UNLOCK;
		1335
		1336	return 1;
		1337	}
		1338
		1339	static int
		1340	api_is_ready (SV *coro_sv)
		1341	{
		1342	dTHX;
		1343	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1344	}
		1345
		1346	static void
		1347	prepare_schedule (pTHX_ struct transfer_args *ta)
		1348	{
		1349	SV *prev_sv, *next_sv;
		1350
		1351	for (;;)
		1352	{
		1353	LOCK;
		1354	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1355
		1356	/* nothing to schedule: call the idle handler */
		1357	if (expect_false (!next_sv))
		1358	{
		1359	dSP;
		1360	UNLOCK;
		1361
		1362	ENTER;
		1363	SAVETMPS;
		1364
		1365	PUSHMARK (SP);
		1366	PUTBACK;
		1367	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1368
		1369	FREETMPS;
		1370	LEAVE;
		1371	continue;
		1372	}
		1373
		1374	ta->next = SvSTATE (next_sv);
		1375
		1376	/* cannot transfer to destroyed coros, skip and look for next */
		1377	if (expect_false (ta->next->flags & CF_DESTROYED))
		1378	{
		1379	UNLOCK;
		1380	SvREFCNT_dec (next_sv);
		1381	/* coro_nready is already taken care of by destroy */
		1382	continue;
		1383	}
		1384
		1385	--coro_nready;
		1386	UNLOCK;
		1387	break;
		1388	}
		1389
		1390	/* free this only after the transfer */
		1391	prev_sv = SvRV (coro_current);
		1392	ta->prev = SvSTATE (prev_sv);
		1393	TRANSFER_CHECK (*ta);
		1394	assert (ta->next->flags & CF_READY);
		1395	ta->next->flags &= ~CF_READY;
		1396	SvRV_set (coro_current, next_sv);
		1397
		1398	LOCK;
		1399	free_coro_mortal (aTHX);
		1400	coro_mortal = prev_sv;
		1401	UNLOCK;
		1402	}
		1403
		1404	static void
		1405	prepare_cede (pTHX_ struct transfer_args *ta)
		1406	{
		1407	api_ready (coro_current);
		1408	prepare_schedule (aTHX_ ta);
		1409	}
		1410
		1411	static int
		1412	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1413	{
		1414	if (coro_nready)
		1415	{
		1416	SV *prev = SvRV (coro_current);
		1417	prepare_schedule (aTHX_ ta);
		1418	api_ready (prev);
		1419	return 1;
		1420	}
		1421	else
		1422	return 0;
		1423	}
		1424
		1425	static void
		1426	api_schedule (void)
		1427	{
		1428	dTHX;
		1429	struct transfer_args ta;
		1430
		1431	prepare_schedule (aTHX_ &ta);
		1432	TRANSFER (ta);
		1433	}
		1434
		1435	static int
		1436	api_cede (void)
		1437	{
		1438	dTHX;
		1439	struct transfer_args ta;
		1440
		1441	prepare_cede (aTHX_ &ta);
		1442
		1443	if (expect_true (ta.prev != ta.next))
		1444	{
		1445	TRANSFER (ta);
		1446	return 1;
		1447	}
		1448	else
		1449	return 0;
		1450	}
		1451
		1452	static int
		1453	api_cede_notself (void)
		1454	{
		1455	dTHX;
		1456	struct transfer_args ta;
		1457
		1458	if (prepare_cede_notself (aTHX_ &ta))
		1459	{
		1460	TRANSFER (ta);
		1461	return 1;
		1462	}
		1463	else
		1464	return 0;
		1465	}
		1466
		1467	static void
		1468	api_trace (SV *coro_sv, int flags)
		1469	{
		1470	dTHX;
		1471	struct coro *coro = SvSTATE (coro_sv);
		1472
		1473	if (flags & CC_TRACE)
		1474	{
		1475	if (!coro->cctx)
		1476	coro->cctx = cctx_new ();
		1477	else if (!(coro->cctx->flags & CC_TRACE))
		1478	croak ("cannot enable tracing on coroutine with custom stack");
		1479
		1480	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1481	}
		1482	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1483	{
		1484	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1485
		1486	if (coro->flags & CF_RUNNING)
		1487	PL_runops = RUNOPS_DEFAULT;
		1488	else
		1489	coro->slot->runops = RUNOPS_DEFAULT;
		1490	}
		1491	}
		1492
777	MODULE = Coro::State PACKAGE = Coro::State	1493	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
778		1494
779	PROTOTYPES: ENABLE	1495	PROTOTYPES: DISABLE
780		1496
781	BOOT:	1497	BOOT:
782	{ /* {} necessary for stoopid perl-5.6.x */	1498	{
783	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1499	#ifdef USE_ITHREADS
784	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1500	MUTEX_INIT (&coro_mutex);
		1501	#endif
		1502	BOOT_PAGESIZE;
		1503
		1504	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1505	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1506
		1507	hv_sig = coro_get_hv ("SIG", TRUE);
		1508	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1509	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1510
		1511	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1512	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1513
785	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1514	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
786		1515
787	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1516	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
788	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1517	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
789	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1518	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
790	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1519	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
791
792	if (!padlist_cache)
793	padlist_cache = newHV ();
794		1520
795	main_mainstack = PL_mainstack;	1521	main_mainstack = PL_mainstack;
796	}	1522	main_top_env = PL_top_env;
797		1523
798	Coro::State	1524	while (main_top_env->je_prev)
799	_newprocess(args)	1525	main_top_env = main_top_env->je_prev;
800	SV * args	1526
801	PROTOTYPE: $	1527	coroapi.ver = CORO_API_VERSION;
		1528	coroapi.transfer = api_transfer;
		1529
		1530	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1531	}
		1532
		1533	SV *
		1534	new (char *klass, ...)
802	CODE:	1535	CODE:
803	Coro__State coro;	1536	{
		1537	struct coro *coro;
		1538	HV *hv;
		1539	int i;
804		1540
805	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
806	croak ("Coro::State::_newprocess expects an arrayref");
807
808	New (0, coro, 1, struct coro);	1541	Newz (0, coro, 1, struct coro);
		1542	coro->args = newAV ();
		1543	coro->flags = CF_NEW;
809		1544
810	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1545	if (coro_first) coro_first->prev = coro;
811	coro->mainstack = 0; /* actual work is done inside transfer */	1546	coro->next = coro_first;
812	coro->stack = 0;	1547	coro_first = coro;
813		1548
814	RETVAL = coro;	1549	coro->hv = hv = newHV ();
		1550	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1551	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1552
		1553	av_extend (coro->args, items - 1);
		1554	for (i = 1; i < items; i++)
		1555	av_push (coro->args, newSVsv (ST (i)));
		1556	}
815	OUTPUT:	1557	OUTPUT:
816	RETVAL	1558	RETVAL
817		1559
		1560	# these not obviously related functions are all rolled into the same xs
		1561	# function to increase chances that they all will call transfer with the same
		1562	# stack offset
818	void	1563	void
819	transfer(prev, next, flags)	1564	_set_stacklevel (...)
820	Coro::State_or_hashref prev	1565	ALIAS:
821	Coro::State_or_hashref next	1566	Coro::State::transfer = 1
822	int flags	1567	Coro::schedule = 2
823	PROTOTYPE: @	1568	Coro::cede = 3
		1569	Coro::cede_notself = 4
		1570	Coro::Event::next = 5
		1571	Coro::Event::next_cancel = 6
824	CODE:	1572	PPCODE:
825	PUTBACK;	1573	{
826	transfer (aTHX_ prev, next, flags);	1574	struct transfer_args ta;
827	SPAGAIN;	1575	int repeat = 0;
		1576
		1577	do
		1578	{
		1579	switch (ix)
		1580	{
		1581	case 0:
		1582	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1583	ta.next = 0;
		1584	break;
		1585
		1586	case 1:
		1587	if (items != 2)
		1588	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1589
		1590	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1591	break;
		1592
		1593	case 2:
		1594	prepare_schedule (aTHX_ &ta);
		1595	break;
		1596
		1597	case 3:
		1598	prepare_cede (aTHX_ &ta);
		1599	break;
		1600
		1601	case 4:
		1602	if (!prepare_cede_notself (aTHX_ &ta))
		1603	XSRETURN_EMPTY;
		1604
		1605	break;
		1606
		1607	case 5:
		1608	case 6:
		1609	if (items != 1)
		1610	croak ("Coro::Event::next (watcher) expects one argument, not %d", items);
		1611
		1612	{
		1613	SV *ev = coroapi.coro_event_next (ST (0), ix == 6, GIMME_V != G_VOID);
		1614
		1615	if (ev)
		1616	{
		1617	if (GIMME_V != G_VOID)
		1618	{
		1619	XPUSHs (ev);
		1620	XSRETURN (1);
		1621	}
		1622	else
		1623	XSRETURN_EMPTY;
		1624	}
		1625	}
		1626
		1627	prepare_schedule (aTHX_ &ta);
		1628	repeat = 1;
		1629	break;
		1630	}
		1631
		1632	BARRIER;
		1633	TRANSFER (ta);
		1634	BARRIER;
		1635	}
		1636	while (repeat);
		1637
		1638	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1639	XSRETURN_YES;
		1640	}
		1641
		1642	bool
		1643	_destroy (SV *coro_sv)
		1644	CODE:
		1645	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1646	OUTPUT:
		1647	RETVAL
828		1648
829	void	1649	void
830	DESTROY(coro)
831	Coro::State coro
832	CODE:
833
834	if (coro->mainstack && coro->mainstack != main_mainstack)
835	{
836	struct coro temp;
837
838	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
839	LOAD(aTHX_ coro);
840
841	destroy_stacks (aTHX);
842
843	LOAD((&temp)); /* this will get rid of defsv etc.. */
844
845	coro->mainstack = 0;
846	}
847
848	deallocate_stack (coro);
849
850	Safefree (coro);
851
852	void
853	flush()
854	CODE:
855	#ifdef MAY_FLUSH
856	flush_padlist_cache ();
857	#endif
858
859	void
860	_exit(code)	1650	_exit (code)
861	int code	1651	int code
862	PROTOTYPE: $	1652	PROTOTYPE: $
863	CODE:	1653	CODE:
864	#if defined(__GLIBC__) || _POSIX_C_SOURCE
865	_exit (code);	1654	_exit (code);
866	#else
867	signal (SIGTERM, SIG_DFL);
868	raise (SIGTERM);
869	exit (code);
870	#endif
871		1655
872	MODULE = Coro::State PACKAGE = Coro::Cont	1656	int
		1657	cctx_stacksize (int new_stacksize = 0)
		1658	CODE:
		1659	RETVAL = coro_stacksize;
		1660	if (new_stacksize)
		1661	coro_stacksize = new_stacksize;
		1662	OUTPUT:
		1663	RETVAL
873		1664
874	# this is slightly dirty (should expose a c-level api)	1665	int
		1666	cctx_count ()
		1667	CODE:
		1668	RETVAL = cctx_count;
		1669	OUTPUT:
		1670	RETVAL
		1671
		1672	int
		1673	cctx_idle ()
		1674	CODE:
		1675	RETVAL = cctx_idle;
		1676	OUTPUT:
		1677	RETVAL
875		1678
876	void	1679	void
877	yield(...)	1680	list ()
878	PROTOTYPE: @	1681	PPCODE:
		1682	{
		1683	struct coro *coro;
		1684	for (coro = coro_first; coro; coro = coro->next)
		1685	if (coro->hv)
		1686	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1687	}
		1688
		1689	void
		1690	call (Coro::State coro, SV *coderef)
		1691	ALIAS:
		1692	eval = 1
		1693	CODE:
		1694	{
		1695	if (coro->mainstack)
		1696	{
		1697	struct coro temp;
		1698
		1699	if (!(coro->flags & CF_RUNNING))
		1700	{
		1701	save_perl (aTHX_ &temp);
		1702	load_perl (aTHX_ coro);
		1703	}
		1704
		1705	{
		1706	dSP;
		1707	ENTER;
		1708	SAVETMPS;
		1709	PUSHMARK (SP);
		1710	PUTBACK;
		1711
		1712	if (ix)
		1713	eval_sv (coderef, 0);
		1714	else
		1715	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1716
		1717	SPAGAIN;
		1718	FREETMPS;
		1719	LEAVE;
		1720	PUTBACK;
		1721	}
		1722
		1723	if (!(coro->flags & CF_RUNNING))
		1724	{
		1725	save_perl (aTHX_ coro);
		1726	load_perl (aTHX_ &temp);
		1727	}
		1728	}
		1729	}
		1730
		1731	SV *
		1732	is_ready (Coro::State coro)
		1733	PROTOTYPE: $
		1734	ALIAS:
		1735	is_ready = CF_READY
		1736	is_running = CF_RUNNING
		1737	is_new = CF_NEW
		1738	is_destroyed = CF_DESTROYED
		1739	CODE:
		1740	RETVAL = boolSV (coro->flags & ix);
		1741	OUTPUT:
		1742	RETVAL
		1743
		1744	void
		1745	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1746
		1747	SV *
		1748	has_stack (Coro::State coro)
		1749	PROTOTYPE: $
		1750	CODE:
		1751	RETVAL = boolSV (!!coro->cctx);
		1752	OUTPUT:
		1753	RETVAL
		1754
		1755	int
		1756	is_traced (Coro::State coro)
		1757	PROTOTYPE: $
		1758	CODE:
		1759	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1760	OUTPUT:
		1761	RETVAL
		1762
		1763	IV
		1764	rss (Coro::State coro)
		1765	PROTOTYPE: $
		1766	ALIAS:
		1767	usecount = 1
879	CODE:	1768	CODE:
880	static SV *returnstk;	1769	switch (ix)
881	SV *sv;	1770	{
		1771	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1772	case 1: RETVAL = coro->usecount; break;
		1773	}
		1774	OUTPUT:
		1775	RETVAL
		1776
		1777
		1778	MODULE = Coro::State PACKAGE = Coro
		1779
		1780	BOOT:
		1781	{
		1782	int i;
		1783
		1784	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1785	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1786	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1787
		1788	coro_current = coro_get_sv ("Coro::current", FALSE);
		1789	SvREADONLY_on (coro_current);
		1790
		1791	coro_stash = gv_stashpv ("Coro", TRUE);
		1792
		1793	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1794	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1795	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1796	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1797	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1798	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1799
		1800	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1801	coro_ready[i] = newAV ();
		1802
		1803	{
		1804	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1805	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
		1806
		1807	coroapi.schedule = api_schedule;
		1808	coroapi.cede = api_cede;
		1809	coroapi.cede_notself = api_cede_notself;
		1810	coroapi.ready = api_ready;
		1811	coroapi.is_ready = api_is_ready;
		1812	coroapi.nready = &coro_nready;
		1813	coroapi.current = coro_current;
		1814
		1815	GCoroAPI = &coroapi;
		1816	sv_setiv (sv, (IV)&coroapi);
		1817	SvREADONLY_on (sv);
		1818	}
		1819	}
		1820
		1821	void
		1822	_set_current (SV *current)
		1823	PROTOTYPE: $
		1824	CODE:
		1825	SvREFCNT_dec (SvRV (coro_current));
		1826	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1827
		1828	int
		1829	prio (Coro::State coro, int newprio = 0)
		1830	ALIAS:
		1831	nice = 1
		1832	CODE:
		1833	{
		1834	RETVAL = coro->prio;
		1835
		1836	if (items > 1)
		1837	{
		1838	if (ix)
		1839	newprio = coro->prio - newprio;
		1840
		1841	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1842	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1843
		1844	coro->prio = newprio;
		1845	}
		1846	}
		1847	OUTPUT:
		1848	RETVAL
		1849
		1850	SV *
		1851	ready (SV *self)
		1852	PROTOTYPE: $
		1853	CODE:
		1854	RETVAL = boolSV (api_ready (self));
		1855	OUTPUT:
		1856	RETVAL
		1857
		1858	int
		1859	nready (...)
		1860	PROTOTYPE:
		1861	CODE:
		1862	RETVAL = coro_nready;
		1863	OUTPUT:
		1864	RETVAL
		1865
		1866	void
		1867	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1868	PROTOTYPE: $;$
		1869	CODE:
		1870	SvREFCNT_dec (self->throw);
		1871	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1872
		1873	# for async_pool speedup
		1874	void
		1875	_pool_1 (SV *cb)
		1876	CODE:
		1877	{
		1878	struct coro *coro = SvSTATE (coro_current);
		1879	HV *hv = (HV *)SvRV (coro_current);
882	AV *defav = GvAV (PL_defgv);	1880	AV *defav = GvAV (PL_defgv);
883	struct coro *prev, *next;	1881	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1882	AV *invoke_av;
		1883	int i, len;
884		1884
885	if (!returnstk)	1885	if (!invoke)
886	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));	1886	croak ("\3async_pool terminate\2\n");
887		1887
888	/* set up @_ -- ugly */	1888	SvREFCNT_dec (coro->saved_deffh);
889	av_clear (defav);	1889	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1890
		1891	hv_store (hv, "desc", sizeof ("desc") - 1,
		1892	newSVpvn (strpair ("[async_pool]")), 0);
		1893
		1894	invoke_av = (AV *)SvRV (invoke);
		1895	len = av_len (invoke_av);
		1896
		1897	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1898
		1899	if (len > 0)
		1900	{
890	av_fill (defav, items - 1);	1901	av_fill (defav, len - 1);
891	while (items--)	1902	for (i = 0; i < len; ++i)
892	av_store (defav, items, SvREFCNT_inc (ST(items)));	1903	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1904	}
893		1905
894	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
895	sv = av_pop ((AV *)SvRV (returnstk));
896	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
897	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
898	SvREFCNT_dec (sv);	1906	SvREFCNT_dec (invoke);
899
900	transfer(aTHX_ prev, next, 0);
901
902	MODULE = Coro::State PACKAGE = Coro
903
904	# this is slightly dirty (should expose a c-level api)
905
906	BOOT:
907	{
908	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
909	coro_ready = newAV ();
910	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
911	}	1907	}
912		1908
913	void	1909	void
914	ready(self)	1910	_pool_2 (SV *cb)
915	SV * self
916	CODE:	1911	CODE:
917	av_push (coro_ready, SvREFCNT_inc (self));	1912	{
		1913	struct coro *coro = SvSTATE (coro_current);
		1914
		1915	sv_setsv (cb, &PL_sv_undef);
		1916
		1917	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1918	coro->saved_deffh = 0;
		1919
		1920	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1921	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1922	croak ("\3async_pool terminate\2\n");
		1923
		1924	av_clear (GvAV (PL_defgv));
		1925	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1926	newSVpvn (strpair ("[async_pool idle]")), 0);
		1927
		1928	coro->prio = 0;
		1929
		1930	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1931	api_trace (coro_current, 0);
		1932
		1933	av_push (av_async_pool, newSVsv (coro_current));
		1934	}
		1935
		1936
		1937	MODULE = Coro::State PACKAGE = Coro::AIO
		1938
		1939	SV *
		1940	_get_state ()
		1941	CODE:
		1942	{
		1943	struct io_state *data;
		1944
		1945	RETVAL = newSV (sizeof (struct io_state));
		1946	data = (struct io_state *)SvPVX (RETVAL);
		1947	SvCUR_set (RETVAL, sizeof (struct io_state));
		1948	SvPOK_only (RETVAL);
		1949
		1950	data->errorno = errno;
		1951	data->laststype = PL_laststype;
		1952	data->laststatval = PL_laststatval;
		1953	data->statcache = PL_statcache;
		1954	}
		1955	OUTPUT:
		1956	RETVAL
918		1957
919	void	1958	void
920	schedule(...)	1959	_set_state (char *data_)
921	ALIAS:	1960	PROTOTYPE: $
922	cede = 1
923	CODE:	1961	CODE:
924	SV *prev = GvSV (coro_current);	1962	{
925	SV *next = av_shift (coro_ready);	1963	struct io_state *data = (void *)data_;
926		1964
927	if (next == &PL_sv_undef)	1965	errno = data->errorno;
928	next = SvREFCNT_inc (GvSV (coro_idle));	1966	PL_laststype = data->laststype;
		1967	PL_laststatval = data->laststatval;
		1968	PL_statcache = data->statcache;
		1969	}
929		1970
930	if (ix)
931	av_push (coro_ready, SvREFCNT_inc (prev));
932
933	GvSV (coro_current) = SvREFCNT_inc (next);
934	transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"),
935	sv_to_coro (next, "Coro::schedule", "next coroutine"),
936	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
937	SvREFCNT_dec (next);
938	SvREFCNT_dec (prev);
939

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines